BOLETI OF THE UNITED STATES 153 
Boletus indecisus Px. 
UNDECIDED BoLETUS 
IRE, Alits TO, 9S 
Pileus convex or nearly plane, dry, slightly tomentose, 
ochraceous-brown, often wavy or irregular on the margin, 
flesh white, unchangeable; taste mz/d, tubes nearly plane or 
convex, adnate, grayish, becoming tinged with flesh-color 
when mature, changing to brownish where wounded, their 
mouths small, subrotund; stem minutely furfuraceous, 
straight or flexuous, veézculated above, pallid without and 
within; spores oblong, drownzsh flesh-color, .0005 to .0006 in. 
long, .00016 broad. 
Pileus 3 to 4 in. broad; stem 2 to 4 in. long, 4 to 6 lines 
thick. 
Thin oak woods. New York, Peck. 
The mild taste and darker colored spores will separate 
this Boletus from any form of B. felleus. Its stem reticu- 
lated above distinguishes it from B. alutarzus. It resembles 
L. modestus in some respects but its tubes are not at all 
yellow. 
Boletus alutarius Fr. 
TAN-COLORED BOLETUS 
Hym. Eur. p. 516. Syl. Fung. Vol. VI, p. 43 
Pileus convex, then nearly plane, soft, velvety, becoming 
glabrous, drownzsh tan color, flesh almost unchangeable, 
taste mzld, watery, tubes depressed around the stem, plane, 
short, round, white, becoming brownish where wounded; 
stem solid, bulbous, nearly even, scrupose at the top; spores 
.00055 in. long, .ooo16 broad. 
Pileus 3 to 4 in. broad; stem 4 to 5 in. long. 
Grassy woods. Minnesota, Johnson. 
